Green’s Dictionary of Slang

layout n.

1. [mid-19C] an achievement, an activity.

2. in senses of a set, a display.

(a) [mid–late 19C] a set of equipment or clothes.

(b) [mid-19C+] the table, dice, cards etc required for setting up a gambling club, whether legitimate or as a prop for a confidence trick.

(c) [mid-19C+] any form of display, e.g. a showman’s stall.

3. [mid-19C–1950s] (US) a plan, a scheme.

4. [mid-19C–1960s] (US) an association of persons, such as a gang or team.

5. [mid-19C+] (US) an apartment, a house, or any place.

6. in drug uses [the relevant ‘kit’ is ‘laid out’ in front of the user before use].

(a) [late 19C–1960s] an opium den.

(b) [late 19C–1980s] (drugs, also hop layout) the various accoutrements – pipe, box, needle etc – required for smoking opium.

(c) [1920s+] the syringe, cotton etc required for injecting a narcotic.

7. [late 19C+] a situation, the facts.

8. [late 19C] (Aus.) the components of a drink, e.g. whiskey and water, brandy and soda.

9. [1900s] a meal, a ‘spread’.

In phrases

layout across the drink (n.) [sense 5 above + drink n.1 (2)]

[1940s] (US black) Europe.